Or if you like it simple I can only recommend Jerboa

I dont know where I heard this story but it was something like the following:

In a company a very valuable machine breaks and becomes inoperable, so they call the support. They send a mechanic to fix the machine. The mechanic arrives inspects the machine, opens it, presses a button and it works as if nothing happened. The manager then asks why he is paying the mechanic just to press a button. The mechanic answers “you aren’t paying me for pressing the button, but for knowing which button to press”.